Fort Worth daily gazette. (Fort Worth, Tex.) 1882-1891, 1887-11-18

current service is required. A soft iron
ore is placed In the solenoid, and any
variation of the current in the latter
causes q corresponding change in the
position of the core. The core is con-
nected by lever to the gas valve, the
opening through which is thus varied,
pari passu, with the current through the
coil. This is so arranged tna5
the greater the load on the dynamo the
wider is the gas valve opened, with the
curious result that the speed OF the
engine is greater under high loads tnan
under low Electrical Review.
Sometime ago M. Debove announced
that he had been able to afford great re-
lief in q case of obstinate sciatica by
means of spray of chloride Of methyl sp-
piled along the course OF the sclstlc
nerve in the Unaffected member. At
recent meeting of the Societe de Biologle
lie Concours Medical, August s, 1850
NJ. Raymond reported that he had obtain
| ed favorable results by a similar method
in three cases. He found, however, that
the effect was the same even Nnen the
spray ltec ted to any PIr5 OF
the limb, and not necessarily along the
course of the scatic nerve. This would
seem to prove that the relief OF the pain
was due TO an impression made n oon the
spinal ceuters by refrigeration OF the per
! ipheral nerve examinations rather IN Il TO
direct influence exerted upon the trunk
of the affected nerve itself or Of its fol!0 e
! in the opposite limb.
A new principle for keeping Ilants
through the. winter without artificial heat
! was recently shown at Regents Park,
| London, with the plants grown IN them
| last winter. The essence OF ire lnYen-
ton is that ali light and heat shall previ-
Ously pass through shallow ls, er OF
water. The water is found to exercise
great control over temperature, pro Getting
plan entirely from frost in WiD}~r and
from excessive direct heat in summer.
| The application involves no difficulty. In
the case OF a garden frame, t. sliding
| "Water-lightn about three inches doep is
made TO 1T over the frame contain! e the
plants; the only difference from "a glass
! light being that it holds water and Is 81
ways placed in a fat position. The
depth OF the water generally kept in the
tank is about two inches in winter and
summer, and half the depth n spring and
sutunn.- Popular Science News.
TO make cheap, simple and efficient
battery, suitable for the use CT expert
mentors and amateurs, take en- ordinary
glsss fruit jar, fitted with q cover OF wood
or hard rubber, and place in it a number
Of pieces Of electric light carbons, hun
| dreds of which can be picked up IN the
streets every morning after sthe lamps
| have been trimmed. The connection be-
tween the carbons and the binding screw
on the top of the cover is best made with
gutta perchs covered wire, having it's
lower end barred and wound tightly round
and secured to one Of the csrbops, thus
making connection with all other
pieces in contact with it. 4 piece Of
amalg6mated ENC of any convenient
siz3 or form is suspended within
| the ar from the wooden cover, and has S
| binding-screW attached to 1t. The jar
saould be filed about twc-thirds full
with dilute sulphuric acid or other suita-
BILE solution. The whole battery complete
can be made for % cents, and it will give
good current On closed circuit for 3
long time.
According to the statement OF Mr.
Miles, Well-known engineer, it is s fact
peculiar to Spanish countries that ordIna-
~ brick dust, made from hard-burned,
finely pulveriZed bricks, and mixed with
common lime and sand, is universally end
successfully employed as substitute
for hydraulic cement. Mr.. Miles says that
during sn engineering experience Of some
six years in Cuba his opportunities were
ample for testing its merits. and he found
it in all respects superior to the best
Rosendale hydraulic cement for culverts,
drains, tanks and cisterns, aud even for
roofs. In an experiment 30 Fest the
strength Of this product, il Yves found
a block Of it, one-hslf inch in thickness.
without sand, and after an immersion in
water Tor four months, bore, without
crushing, crumbling or splitting, pres
sure of fifteen pounds per square inch.
1t is thought that by the addition of pull
Verizlng-nills to brick-Yards, to utilize
the waste &nd broken bricks, profitable
manufacture might be csrried on.
WHY German in the Public Schools?